mongodb资源：MongoDB的基于DAO的基本操作

# MongoDao 是一个mongodb使用封装库 # Maven ```xml <dependency> <groupId>cn.finalteam</groupId> <artifactId>mongodao</artifactId> <version>1.0-SNAPSHOT</version> </dependency> ``` # 配置 ## 数据连接配置 ```java public static MongoConfig getMongoConfig(){ MongoConfig mongoConfig = new MongoConfig(); mongoConfig.setServerAddress(new ServerAddress("127.0.0.1", 27017)); try { CompositeConfiguration config = new CompositeConfiguration(); config.addConfiguration(new PropertiesConfiguration("mongo.cfg")); String user = config.getString("user"); String passwd = config.getString("passwd"); String dbname = config.getString("dbname"); mongoConfig.setUsername(user); mongoConfig.setPassword(passwd); mongoConfig.setDatabaseName(dbname); } catch (ConfigurationException e) { e.printStackTrace(); } MongoClientOptions mongoClientOptions = new MongoClientOptions.Builder() .socketKeepAlive(true) .connectTimeout(5000) .socketTimeout(5000) .readPreference(ReadPreference.primary()) .connectionsPerHost(5) .maxWaitTime(5000) .threadsAllowedToBlockForConnectionMultiplier(30) .build(); mongoConfig.setMongoClientOptions(mongoClientOptions); return mongoConfig; } ``` ## 数据操作DAO ```java public class TeacherDao extends MongoDao<Teacher> { public TeacherDao(MongoConfig mongoConfig){ super(mongoConfig); } //在这里可以扩展dao操作方法 } ``` # CRUD操作 ## 插入 ```java Teacher teacher = new Teacher(); teacher.setName("马老师"); teacher.setAge(45); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); teacher.setBirthday(sdf.parse("1972-01-01").getTime()); Map<String, List<Student>> classes = new HashMap<String, List<Student>>(); List<Student> students = new ArrayList<Student>(); for(int i = 0; i < 10; i++){ Student student = new Student(); student.setName("彭学生" + i); student.setAge(new Random().nextInt(10) + 10); students.add(student); } classes.put("计高071", students); teacher.setClasses(classes); teacher.setMan(true); List<String> courses = new ArrayList<String>(); courses.add("计算机应用"); courses.add("C语言程序设计"); teacher.setCourse(courses); teacherDao.insertOne(teacher); ``` ## 查询 ```java Bson filter = Filters.eq("name", "马老师"); List<Teacher> teacherList = teacherDao.find(filter); System.out.println(JSON.toJSONString(teacherList)); ``` ## 修改 ```java Bson filter = Filters.eq("name", "马老师"); Document document = new Document(); document.put("isMan", false); long l = teacherDao.updateOne(filter, document); ``` ## 删除 ```java Bson filter = Filters.eq("name", "马老师"); long count = teacherDao.delete(filter); ```